I'm new here (but not to engines), so excuse me if I am missing something.
I have a La105 tractor, and I've been having some problems with it.
I had to replace the ignition setup (key and all) since mine broke and some pieces were lost. (Long story, don't ask.) I bought this from ebay:
I hooked it up, made sure the battery had a full charge, made sure the brake was on, the blades were off, everything. I put the key in the ignition and turn it, and get nothing. No cranking, no noise. Also, the "Service reminder" hour meter isn't going on.
My lawn eventually got REALLY long, and I wasn't going to mow my 4 acre lawn with a pushmower.
I found out that if I put the key in the ignition and turn it, I can then start the engine by using a piece of heavy gauge wire and connecting the two posts on the starter solenoid.
I can run it like this for awhile, then the engine quits. It can, however be restarted.
If it helps, the Reverse Implement Option button does not work, at all. But if I shift into reverse while mowing the engine will cut off.
If anyone has any ideas what my problem could be, please tell me.